function identify() {
    return this.name.toUpperCase()
}

function speak() {
    var greeting = "Hello,i'm" + identify.call(this)
    console.log(greeting);
}


// function identify(context) {
//     return context.name.toUpperCase()
// }

// function speak(context) {
//     var greeting = "Hello,i'm" + identify.call(context)
//     console.log(greeting);
// }

var me = {
    name: 'wn'
}

var you = {
    name: 'zj'
}

// let result = identify.call(me);  //WN  this.name == me.name
// console.log(result);

// speak.call(me)
// identify(me)

speak(me)
